No disrespect intended but.... REALLY? A nine year-old should not be the dictator of your trip. I can understand the 6 yr old not being able to walk it but not a 9 year old. I would certainly get her in training right now walking a little farther each day and also a little less whining each day. Btw, I have 3 children ages 6, 11 and 15. We have basically gone to WDW every year for the last 7 years and have experience almost all ages during this time from infant - teens. Whining is NOT allowed. Period.